by Prof. Dr. Sondang P. Siagian, M.P.A $7.00
by Pandji Anoraga, S.E, M.M $9.00
by Salah Wahab $9.00
by Drs. Rudy T. Erwin, S.H $6.00
by Suwarno $7.00
by Drs. Mustaqim $7.00
by $11.00
by Kunio, Yoshihara $6.00
by $7.00
by Lipschutz $12.00
by Aziz Alimul $9.00
by Disney $6.00